What is a primary reason for defining OCS limits with exact points?

Defining OCS (On Controlled Signal) limits with exact points is crucial primarily to provide clarity and prevent accidents. By establishing specific boundaries, it allows employees and crews to have a clear understanding of where the limits of controlled operations are, reducing the chances of miscommunication or misunderstanding about the status of the track. Precision in defining these limits is essential in ensuring all personnel know when they are operating under different rules or signals, which directly contributes to the safety of train operations.

Exact points help all involved to maintain proper situational awareness and follow the appropriate protocols in those areas, which is a key factor in accident prevention. When everyone is aware of the precise points marking these limits, it minimizes potential hazards and enhances the overall safety of train movement within those operational zones.